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Pretty-Print JSON in Java
...d code to parse a string into a JsonElement, usually you already have that from previous work you do with the JSON data. But I wanted to include it here to make the usage clearer.
– Ray Hulha
Feb 20 '14 at 15:01
...
Difference between style = “position:absolute” and style = “position:relative”
...t;</div>
</body>
...the <div> would be positioned 20px from the top of the browser viewport, and 20px from the left edge of same.
However, if I did something like this:
<div id="outer" style="position:relative">
<div id="inner" style="position:absolute; left: 20px;...
Getting error while sending email through Gmail SMTP - “Please log in via your web browser and then
... App password instead of your regular password.
Sign in to your account from the web version of Gmail at https://mail.google.com. Once you’re signed in, try signing in
to the mail app again.
Visit http://www.google.com/accounts/DisplayUnlockCaptcha and sign in with your Gmail usern...
lexers vs parsers
...at parsers and lexers have in common:
They read symbols of some alphabet from their input.
Hint: The alphabet doesn't necessarily have to be of letters. But it
has to be of symbols which are atomic for the language
understood by parser/lexer.
Symbols for the lexer: ASCII characters.
Symbols for ...
Kill some processes by .exe file name
....GetProcessesByName("whatever"))
{
process.Kill();
}
(leave off .exe from process name)
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Skip rows during csv import pandas
...
You can try yourself:
>>> import pandas as pd
>>> from StringIO import StringIO
>>> s = """1, 2
... 3, 4
... 5, 6"""
>>> pd.read_csv(StringIO(s), skiprows=[1], header=None)
0 1
0 1 2
1 5 6
>>> pd.read_csv(StringIO(s), skiprows=1, header=Non...
System.currentTimeMillis vs System.nanoTime
...() gives you a nanosecond-precise time, relative to some arbitrary point.
From the Java Documentation:
public static long nanoTime()
Returns the current value of the most precise available system timer, in nanoseconds.
This method can only be used to
measure elapsed time and is not
...
How do I daemonize an arbitrary script in unix?
...alls svscan, which does the main work of looking for services; it's called from init so init will arrange to restart it if it dies for any reason.
Per-service setup
Each service needs a service directory, which stores housekeeping information about the service. You can also make a location to ho...
How to clear all the jobs from Sidekiq?
I am using sidekiq for background tasks in Rails application. Now the numbers of jobs becomes more, so I want to clear all the jobs. I tried the following command in console
...
How to run Unix shell script from Java code?
It is quite simple to run a Unix command from Java.
17 Answers
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